Civil War Letter Identified another Relative

My husband’s great-grandfather, James Monroe Jennings, left behind a letter written during the Civil War to his mother, telling her of the death of his brother, William Harney Jennings. We discovered it in 2011 in an old chest. In the letter , which describes the Battle of Weldon in May 1864, he mentions some of the wounded and killed. One name surprised us: “Serg. Jackson.” Upon researching this, Serg. Jackson turned out to be Lemuel Jackson, who was my husband’s great-great-grandfather on his mother’s side.